<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="./style.css">
</head>
<body>
    <div id="box">
        <h1>用户登录</h1>
        用户名：<input type="text" id="username" name="username">
        密码：<input type="password" id="password" name="password">
        <button type="submit">    登录    </button>
    </div>
</body>
</html>